fn print_type()

in sgx_demangle/src/v0.rs [910:1038]
111 lines of code
18 McCabe index (conditional complexity)

    fn print_type(&mut self) -> fmt::Result {
        let tag = parse!(self, next);

        if let Some(ty) = basic_type(tag) {
            return self.print(ty);
        }

        parse!(self, push_depth);

        match tag {
            b'R' | b'Q' => {
                self.print("&")?;
                if self.eat(b'L') {
                    let lt = parse!(self, integer_62);
                    if lt != 0 {
                        self.print_lifetime_from_index(lt)?;
                        self.print(" ")?;
                    }
                }
                if tag != b'R' {
                    self.print("mut ")?;
                }
                self.print_type()?;
            }

            b'P' | b'O' => {
                self.print("*")?;
                if tag != b'P' {
                    self.print("mut ")?;
                } else {
                    self.print("const ")?;
                }
                self.print_type()?;
            }

            b'A' | b'S' => {
                self.print("[")?;
                self.print_type()?;
                if tag == b'A' {
                    self.print("; ")?;
                    self.print_const(true)?;
                }
                self.print("]")?;
            }
            b'T' => {
                self.print("(")?;
                let count = self.print_sep_list(Self::print_type, ", ")?;
                if count == 1 {
                    self.print(",")?;
                }
                self.print(")")?;
            }
            b'F' => self.in_binder(|this| {
                let is_unsafe = this.eat(b'U');
                let abi = if this.eat(b'K') {
                    if this.eat(b'C') {
                        Some("C")
                    } else {
                        let abi = parse!(this, ident);
                        if abi.ascii.is_empty() || !abi.punycode.is_empty() {
                            invalid!(this);
                        }
                        Some(abi.ascii)
                    }
                } else {
                    None
                };

                if is_unsafe {
                    this.print("unsafe ")?;
                }

                if let Some(abi) = abi {
                    this.print("extern \"")?;

                    // If the ABI had any `-`, they were replaced with `_`,
                    // so the parts between `_` have to be re-joined with `-`.
                    let mut parts = abi.split('_');
                    this.print(parts.next().unwrap())?;
                    for part in parts {
                        this.print("-")?;
                        this.print(part)?;
                    }

                    this.print("\" ")?;
                }

                this.print("fn(")?;
                this.print_sep_list(Self::print_type, ", ")?;
                this.print(")")?;

                if this.eat(b'u') {
                    // Skip printing the return type if it's 'u', i.e. `()`.
                } else {
                    this.print(" -> ")?;
                    this.print_type()?;
                }

                Ok(())
            })?,
            b'D' => {
                self.print("dyn ")?;
                self.in_binder(|this| {
                    this.print_sep_list(Self::print_dyn_trait, " + ")?;
                    Ok(())
                })?;

                if !self.eat(b'L') {
                    invalid!(self);
                }
                let lt = parse!(self, integer_62);
                if lt != 0 {
                    self.print(" + ")?;
                    self.print_lifetime_from_index(lt)?;
                }
            }
            b'B' => {
                self.print_backref(Self::print_type)?;
            }
            _ => {
                // Go back to the tag, so `print_path` also sees it.
                let _ = self.parser.as_mut().map(|p| p.next -= 1);
                self.print_path(false)?;
            }
        }

        self.pop_depth();
        Ok(())
    }